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Net Safety Monitoring Inc
MLP-A/AR/AD-ST1400-25 7
SENSOR SEPARATION
Figure 6: Wiring—Sensor Separation
As the Sensor must be located in one location and the Controller in a location
where it can be easily reached, it is often necessary to “separate” the Controller
and Sensor.
The Sensor separation kit (SEP) is composed of a junction box and terminal
strip. Refer to the Net Safety Multi-purpose Junction Box manual (MAN-0081)
for terminal designation when wiring for sensor separation.
Shielded copper instrument wire (minimum 18 AWG) should be used for
separations up to 500 feet. Shielded copper instrument wire (minimum
16 AWG) should be used for separations up to 2000 feet. Consult the factory if a
greater separation distance is required.
Ensure that the appropriate wire is used for Class 1/Division 1 hazardous
applications.
Note: If the 4-20 mA signal is not used, connect a jumper between the 4-20
terminal and the COM terminal on the Terminal Board.
RST
+24V
COM
4-20
ISO
Red
Blk
Shld
Terminal Board
Sensor Board
Sensor
Terminals*
Terminals
Modbus RTU
to PLC*
Power
Terminals*
To designated terminal board
and oxygen sensor. See MAN-0081
Multi-purpose Junction Box manual